Experimental study of a photovoltaic solar dryer

This experimental work focuses specifically on the development and construction of a prototype and the study of different strategies to optimize food drying from solar energy. The main study variable is the efficiency of the solar dryer. In order to optimize the system and increase the drying rate it was decided to use a photovoltaic panel which will power a resistive load - thus obtaining higher air temperature which enters the drying chamber. First, are shown some considerations about the range of applications and methods of harnessing solar energy, emphasizing how important it is to conserve food products through solar drying. To elucidate this concept existing models of solar dryers are reviewed, highlighting the most efficient and representative of each category, in order to understand the work already developed in this area. All experimental results were obtained in drying trials during the summer of 2016. These results demonstrate the advantages and disadvantages of each strategy adopted. Calculations were made and performance parameters discussed, allowing to take conclusions about the modus operandi and design of this type of units. In order to benefit the most of the energy generated, and thus reduce waste, certain measures have been identified that promote the correct use of PV panels for drying agricultural products. All of this work is for the purpose of being adopted by local farmers.